Medicine dropper



March 30, 1948. A. ROTHMAN MEDICINE DROPPER Filed Feb. lf2?, 1947 IN VEN TOR. a Rothman.

, ATTORNEY Patented Mar. 30, 1948 U NIT E D S TATEJS PAT yT QFfFI'CEMEDICINE DROPPER Alex Rothman, Bronx, N. Y.

Application February 27, 1947,'Sial'No. 731,171

(Cl. 12`8-233l 4 Claims. 1

This invention relates to new and useful improvements in amedicinedropp'er.

This application is a substituteo'f my application led on February 5,1944, Serial Number 521,169, now abandoned.

lsf/lore specifically, the invention proposes the construction ofV amedicine fdropper having a, resilient bulbior drawing 'and forcingliquid in and out and which is provided with afsmall resilient auxiliarybulb extension arrangedina manner to permit a measuredquantity'ofmedicineor other liquid to be delivered from the bulb when the smallresilient `auxiliary bulb is compressed.

A further object of the invention proposes forming the bulbs asan-integr'al unitto permit a big bulb to be pressed fo'rlling the-dropper, after which the small bulb may be used to deliver the measuredquantity of liquid.

Still another object of the invention proposes the provision of atubular glass extension mounted upon the large resilient bulb forconveying the liquid to and from the bulbs.

Still another object of the invention proposes the provision of a meansupon the auxiliary bulb extension which may be used for limiting theamount of liquid which will be -delivered by the dropper each time theauxiliary bulb extension is compressed.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawings, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

In the accompanying drawing forming a material part oi this disclosure-Fig. 1 isa perspective view of a medicine dropper constructed inaccordance with this invention.

Fig. 2 is an enlarged vertical sectional View taken on the line 2-2 ofFig. 1.

Fig. 3 is a perspective vieW of a medicine dropper constructed inaccordance with a modification of this invention.

Fig. 4 is an enlarged partial vertical sectional view taken on the line4-,4 of Fig. 3.

Fig. 5 is a vertical sectional View taken on the line 5-5 of Fig. 4.

The medicine dropper, according to this invention, includes a. resilientbulb I0. This resilient bulb I0 is formed of rubber or other similarInaterial and is provided with an opening having a beaded edge Il whichis disposed in a complementary recess I2 formed in one end 0f a tubular,

. 2 glass member I3, The `tubular glass member If3 is provided forconveying a liquid to and from the ilteOrOf the resilient bulb l"l 0.

At 'a pointdisposed opposite the tubular glass 'member 'I3 the bulb i0is provided'witha. small resilient auxiliary blllb.eXle1"Sln M lWlilC'llvlnlay be used for dispensing one drop iat'a time, liquid containedvwithin :the large bulb lil. lThis bulb extension I4 is also formed'df'rubber *orlother similar 1material vand Lis "integrally formed 'withthe large bulbv I (I.

The manner of using the medicine droppen in accordance "with -this yformof the invention, is as follows: v

The end of thetubular'gla'ss member v=I3`is`i`n serted-into a vesselcontaininglthe'des'ired medlcineor liquid 'andthe large -bulb Il) :ismanually compressed :to draw a portion 'of 1.the liquid iiito the largebulb I through the tubular glass member I3. The small bulb extension I4is designed to expel one measured drop at each pressure. One advantageof this dropper is that any prescribed number of drops may beadministered without the use of electric light. If it is desired toforce three drops of the liquid contained Within the large bulb I0 fromthe dropper it is merely necessary to compress the bulb extension I4three times to force the air therefrom and cause three drops of liquidcontained within the bulb IB to be displaced and discharge through thetubular glass member I3. The three drop example is merely for thepurpose of illustration, and the bulb extension I4 might be of design tohave any desired capacity.

In the modication of the invention shown in Figs. 4 and 5 the resilientauxiliary bulb extension I4' is provided with a means for limiting theamount the auxiliary bulb extension may be compressed to control thequantity of liquid which will be displaced therefrom. In this form ofthe invention a collar I5 is iixedly mounted Within the bulb extension I4 and slidably supports a second tubular collar IB. 'I'he end of thetubular collar I6 is provided with a spider I'I. A shaft I 8 extendsfrom the spider I'I and slidably passes through an extension I9 formedon the auxiliary bulb I4. The outer end of the shaft |-8 is providedwith a knob 20 which may be pulled outwards to draw on the shaft I8 andmove the tubular collar I6 into an extended position with relation tothe collar I5.

Normally, the tubular collar I5 will be in a retracted position shown inFig. 4, permitting the extension I4 to be easily compressed to displacethe liquid capacity thereof. However, when the Y* 3 tubular collar I6 isin its extended position it will act to limit the degree to which thebulb I4' may be compressed and thus limit the amount of liquid it willdispense when compressed. In other respects this form of the inventionis similar .to that previously shown and like reference numeralsidentify like parts in each of the several vlews.

While I have illustrated and described the preferred embodiment of myinvention, it is to be understood that I do not limit myself to theprecise construction herein disclosed and the right is reserved to allchanges and modications coming within the scope of the invention asdened in the appended claims.

Having thus described my invention, .what IV claim as new and desire tosecure by United States Letters Patent is:

4 thereby, comprising a spider mounted across the outer end of saidsecond collar, a shaft extending from said spider and slidably extendedthrough an opposed wall of said bulb extension to be manually pulled outand pushed in to extend and retract said second collar.

3. A medicine dropper comprising a resilient bulb for drawing andforcing liquid in and out, a small resilient auxiliary bulb extension onsaid bulb for dispensing a small quantity of said liquid, a collar xedlymounted within said small extension, a second collar slidablyextendedrinto said collar, and means for extending said second collarfrom said ilrst collar to limit the amount the 1. A medicine droppercomprising aV resilientV rbulb for drawing and forcing liquid inrandout,

a small resilient auxiliary bulb extension on said bulb for dispensing asmall quantity of said liquid, a collar fixedly mounted within saidsmall extension, a second collar slidably extended into said collar, andmeans for extending said second collar from said first collar to limitthe amount the bulb extension may be compressed to control the amount ofliquid which will be displaced bulb extension may be compressed tocontrol the amount of liquid which will be displaced thereby, comprisinga spider mounted across the outer end of said second collar, `a shaftextending from said spider and slidably extended through an opposed wallof said bulb extension to be manually pulled out and pushed in to extendand retract said second collar, and a knob mounted on the outer endofsaid shaft by which it may be conveniently gripped to be pushed andpulled.v

4. A medicine dropper comprising a resilient bulb for drawing andforcing liquid in and out, a small resilient auxiliary bulb extension onsaid bulb for dispensing a small quantity of said liquid, a collarflxedly mounted within said small extension, arsecond collar slidablyextended into said collar, and means for extending said second collarfrom said first collar to limit the amount the bulb extension may becompressed to control the amount of liquid which will be displacedthereby, and means for limitingY complete disengagement of said collars.

. ALEX ROTHMAN.

